Number and Operations - Fractions - Use equivalent fractions as a strategy to add and subtract fractions.

CCSS.Math.Content.5.NF.A.1
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators.

• For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12.
• (In general, a/b + c/d = (ad + bc)/bd.)

• Online Support Sites:

  • http://www.internet4classrooms.com/common_core/add_subtract_fractions_unlike_denominators_including_number_operations_fractions_fifth_5th_grade_math_mathematics.htm

• Online Practice:

  • IXL:
  • Fractions and mixed numbers: Equivalent fractions (Fifth grade - L.2)
  • Fractions and mixed numbers: Reduce fractions to lowest terms (Fifth grade - L.3)
  • Fractions and mixed numbers: Convert between improper fractions and mixed numbers (Fifth grade - L.4)
  • Add and subtract fractions: Add fractions with unlike denominators (Fifth grade - M.4)
  • Add and subtract fractions: Subtract fractions with unlike denominators (Fifth grade - M.5)
  • Add and subtract fractions: Add 3 or more fractions with unlike denominators (Fifth grade - M.7)
  • Add and subtract fractions: Complete addition and subtraction sentences with fractions (Fifth grade - M.9)
  • Add and subtract fractions: Inequalities with addition and subtraction of fractions (Fifth grade - M.10)
  • Add and subtract fractions: Add mixed numbers with unlike denominators (Fifth grade - M.12)
  • Add and subtract fractions: Subtract mixed numbers with unlike denominators (Fifth grade - M.13)
  • Add and subtract fractions: Complete addition and subtraction sentences with mixed numbers (Fifth grade - M.15)
  • Add and subtract fractions: Inequalities with addition and subtraction of mixed numbers (Fifth grade - M.16)